<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input type="text" placeholder="员工姓名" id="i1">
<input type="text" placeholder="员工工资" id="i2">
<input type="text" placeholder="员工工作" id="i3">
<input type="button" value="添加" onclick="f()">
<table border=" ">
  <caption>员工列表</caption>
  <tr>
    <th>姓名</th>
    <th>工资</th>
    <th>工作</th>
  </tr>
</table>

<script>
    let i1 = document.querySelector("#i1");
    let i2 = document.querySelector("#i2");
    let i3 = document.querySelector("#i3");
    let t = document.querySelector("table");
  function f() {
    let tr = document.createElement("tr")
    let nametd=document.createElement("td");
    let salarytd=document.createElement("td");
    let jobtd=document.createElement("td");
    //把文本框中的内容取出赋值给td
      nametd.innerText=i1.value;
      salarytd.innerText=i2.value;
      jobtd.innerText=i3.value;
      tr.append(nametd,salarytd,jobtd);
    t.append(tr)
  }
</script>
</body>
</html>